/* 屏幕宽度 >= 1200px  */
.container {
  width: 1140px;
  margin: 0 auto;
}
/* 屏幕宽度 >= 992px */
@media screen and (max-width: 1199px) {
  .container {
    width: 960px;
  }
}
/* 屏幕宽度 >= 768px */
@media screen and (max-width: 991px) {
  .container {
    width: 720px;
  }
}
/* 屏幕宽度 >= 576px */
@media screen and (max-width: 767px) {
  .container {
    width: 540px;
  }
}
/* 屏幕宽度 <= 575px */
@media screen and (max-width: 575px) {
  .container {
    width: 100%;
  }
}

.marked-text {
  padding: 40px 0;
  font-size: 18px;
  font-family: 'source serif pro', serif, -apple-system, BlinkMacSystemFont,
    'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue',
    sans-serif;
  line-height: 1.5;
  text-indent: 2em;
}

h1 {
  text-align: center;
}

.form-group {
  margin-bottom: 1rem;
}
.form-label {
  display: block;
  margin-bottom: 0.5rem;
}
.form-control {
  display: block;
  width: 100%;
  height: 3rem;
  padding-left: 1em;
  outline: none;
  border: 1px solid #eee;
  border-radius: 5px;
}
.form-control::placeholder {
  font-size: 14px;
  color: #ddd;
}
textarea.form-control {
  max-width: 100%;
  min-width: 100%;
  min-height: 8rem;
  padding: 0.8rem 1em;
}

.btn {
  display: block;
  width: 100%;
  height: 2.5rem;
  outline: none;
  border: 1px solid #eee;
  border-radius: 5px;
  background-color: #19192c;
  color: white;
  text-align: center;
  line-height: 2rem;
  cursor: pointer;
}

img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.avatar {
  border-radius: 50%;
  overflow: hidden;
}

#app {
  min-height: 100vh;
  padding: 65px 0 50px;
  position: relative;
}
